Here we are again with FCPX cutting stills in-between frames

OK, so I imported and edited a still image in a FCPX project, all is fine. Then I need to tweak the image in Photoshop say, I save the image and it's screwed-up back in FCPX Timeline.
I mean, sub-frame editing is fine and dandy with audio, but with image? There is no sub-frame images in a progressive 23.98 Project. And yes it is visible on playback = I can see an actual jump. And it stays that way unless I re-import the image. Not right!

An image cut in-between frames ???